I had this idea to make a curry in the oven using one of those jarred sauces. (Have never made curry before.) I bought a jar of Patak's Balti cooking sauce... however... the instructions don't mention how to cook it in the oven! What do I do? I want to use raw chicken, onion, cauliflower and sweet potato. I know I need to pre-fry the onion so will get going on that.